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Q: What Pixhawk hardware uses the STM32F427?
A: The F427 powers the Pixhawk 2.1 (Cube) (PX4FMUv3), CUAV Pixhack V3/V5, Holybro Pixhawk 4, and mRo Pixhawk. It is the baseline MCU for all commercial-grade Pixhawk autopilots beyond the entry-level 2.4.x series. The 180 MHz clock and up to 2 MB Flash support the full PX4 v1.12+ modular driver archite
Q: How much faster is the F427 compared to the F405?
A: The F427 runs at 180 MHz vs 168 MHz on the F405 — a ~7% clock increase. More importantly, the F427 offers 256 KB SRAM vs 192 KB (+33%) and 2 MB Flash options vs 1 MB max (+100%). These memory increases are the real differentiator for professional autopilots running dual-redundant EKF instances, comp
Q: What is the STM32F427IIT6 used for?
A: The IIT6 variant is the top-of-line F427 with 2 MB Flash and 140 GPIO in an LQFP-176 package. It is used on premium autopilots requiring maximum I/O: triple-redundant IMU buses, dual GPS, dual CAN, Ethernet, DCMI camera, and 14+ PWM outputs — all on a single chip. Ideal for the Cube Orange+ and simi
The STM32F427ZIT6 belongs to ST's STM32F427 series — the premium Cortex-M4F MCU that powers the iconic Pixhawk 2.1 (Cube) and professional-grade drone autopilots. Running at 180 MHz with up to 2 MB Flash and 256 KB SRAM , the F427 provides the additional performance headroom needed for PX4's modular driver architecture, ArduPilot's full feature set with Lua scripting, and dual-redundant EKF3 instances for safety-critical commercial UAV operations. The 144-pin package delivers 114 GPIO for complete autopilot I/O with triple-redundant IMU buses, multiple CAN interfaces, and high-speed SDIO logging. STM32F427 — the premium mid-range Cortex-M4F MCU running at 180 MHz with up to 2 MB Flash and 256 KB SRAM . Powers the iconic Pixhawk 2.1 (Cube) and professional-grade drone autopilots worldwide.
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Part Number | STM32F427ZIT6 |
| Core | ARM Cortex-M4F |
| Max Clock | 180 MHz |
| Flash | 2 MB |
| SRAM | 256 KB (192 KB + 64 KB CCM) |
| Package | LQFP-144 (20×20 mm, 0.5 mm pitch) |
| Supply Voltage | 1.8V – 3.6V |
| Operating Temperature | −40°C to +85°C |
| GPIO | 114 |
| ADC | 3× 12-bit (16 channels) |
| DAC | 2× 12-bit |
| Timers | 12× 16-bit, 2× 32-bit, 2× watchdog, 1× SysTick |
| Communication | 4× USART, 2× UART, 3× SPI (37.5 Mbit/s), 3× I²C, 2× CAN 2.0B, 1× USB 2.0 OTG FS, 1× SDIO, 1× Ethernet 10/100 MAC, 1× DCMI (8–14 bit camera) |
| DMA | 2× 8-channel (16 streams) |
| Debug | SWD + JTAG |
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